Does Hubble's law work well for galaxies in the Local Group? Why ...

[jeatrice]

Does Hubble's law work well for galaxies in the Local Group? Why or why not?
 
  A) Yes, it works so well that we have never detected any measurable deviations from its predictions.
  B) No, because galaxies in the Local Group are gravitationally bound together.
  C) No, because we do not know the precise value of Hubble's constant.
  D) No, because Hubble did not know the Local Group existed when he discovered his law.

Question 2

In what way is Mercury's core unusual?
 
  What will be an ideal response?

[dmurph1496]

Answer to Question 1

B

Answer to Question 2

Mercury has the largest core relative to the size of the planet.

[jeatrice]

Thanks for the timely response, appreciate it

[cici]

Wow, this really help